The Polish Submarine Wilk after suffering damage while on patrol from
an external explosion (which caused serious leaks and reduced her speed to
4 knots) arrived safely at Dundee on the 25th.
The Dutch Submarine O13, being
overdue from patrol in the North Sea,
is presumed lost.

ORP Orzel

Weekly Résumé

June 6th to June 13th1940

The Polish submarine Orzel has failed to return from patrol and must be
presumed to have been lost.

Conclusions of a meeting

at 10 Downing StreetJune 10, 1940

The Polish Submarine Orzel was overdue, and it was feared
that she was lost.

Information regarding Admiral Submarines and War Cabinet Meetings can be found here on the National Archives.